Journal
NATURE MATERIALS
Volume 14, Issue 8, Pages 796-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NMAT4295
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Funding
- Max Planck-UBC Centre for Quantum Materials
- Killam Fellowship
- A. von Humboldt Fellowship
- NSERC's Steacie Memorial Fellowship
- Canada Research Chairs Program
- NSERC
- CFI
- CIFAR Quantum Materials
- NRC
- CIHR
- Government of Saskatchewan
- University of Saskatchewan
- CLS Graduate Student Travel Support Program
- CIFAR Global Academy
- A. P. Sloan Fellowship
- WD Canada
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Charge-ordered ground states permeate the phenomenology of 3d-based transition metal oxides, and more generally represent a distinctive hallmark of strongly correlated states of matter. The recent discovery of charge order in various cuprate families has fuelled new interest into the role played by this incipient broken symmetry within the complex phase diagram of high-T-c superconductors. Here, we use resonant X-ray scattering to resolve the main characteristics of the charge-modulated state in two cuprate families: Bi2Sr2-xLaxCuO6C6+delta (Bi2201) and YBa2Cu3O6+y (YBCO). We detect no signatures of spatial modulations along the nodal direction in Bi2201, thus clarifying the inter-unit-cell momentum structure of charge order. We also resolve the intra-unit-cell symmetry of the charge-ordered state, which is revealed to be best represented by a bond order with modulated charges on the O-2p orbitals and a prominent d-wave character. These results provide insights into the origin and microscopic description of charge order in cuprates, and its interplay with superconductivity.
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